A measurement of the number of J/ψ events collected with the BESⅢ detector in 2009 and 2012 is performed using inclusive decays of the J/ψ. The number of J/ψ events taken in 2009 is recalculated to be（223.7±1.4）×10⁶, which is in good agreement with the previous measurement, but with significantly improved precision due to improvements in the BESⅢ software. The number of J/ψ events taken in 2012 is determined to be（1086.9±6.0）×10⁶. In total, the number of J/ψ events collecte... 

【文章來源】：Chinese Physics C. 2017,41(01)SCICSCD

【文章頁數(shù)】：10 頁


本文編號：3201066